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/* exynos_drm_crtc.c
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* Authors:
* Inki Dae <inki.dae@samsung.com>
* Joonyoung Shim <jy0922.shim@samsung.com>
* Seung-Woo Kim <sw0312.kim@samsung.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include "exynos_drm_crtc.h"
#include "exynos_drm_drv.h"
#include "exynos_drm_encoder.h"
#include "exynos_drm_plane.h"
#define to_exynos_crtc(x) container_of(x, struct exynos_drm_crtc,\
drm_crtc)
enum exynos_crtc_mode {
CRTC_MODE_NORMAL, /* normal mode */
CRTC_MODE_BLANK, /* The private plane of crtc is blank */
};
/*
* Exynos specific crtc structure.
*
* @drm_crtc: crtc object.
* @drm_plane: pointer of private plane object for this crtc
* @pipe: a crtc index created at load() with a new crtc object creation
* and the crtc object would be set to private->crtc array
* to get a crtc object corresponding to this pipe from private->crtc
* array when irq interrupt occured. the reason of using this pipe is that
* drm framework doesn't support multiple irq yet.
* we can refer to the crtc to current hardware interrupt occured through
* this pipe value.
* @dpms: store the crtc dpms value
* @mode: store the crtc mode value
*/
struct exynos_drm_crtc {
struct drm_crtc drm_crtc;
struct drm_plane *plane;
unsigned int pipe;
unsigned int dpms;
enum exynos_crtc_mode mode;
wait_queue_head_t pending_flip_queue;
atomic_t pending_flip;
};
static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
{
struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
DRM_DEBUG_KMS("crtc[%d] mode[%d]\n", crtc->base.id, mode);
if (exynos_crtc->dpms == mode) {
DRM_DEBUG_KMS("desired dpms mode is same as previous one.\n");
return;
}
if (mode > DRM_MODE_DPMS_ON) {
/* wait for the completion of page flip. */
wait_event(exynos_crtc->pending_flip_queue,
atomic_read(&exynos_crtc->pending_flip) == 0);
drm_vblank_off(crtc->dev, exynos_crtc->pipe);
}
exynos_drm_fn_encoder(crtc, &mode, exynos_drm_encoder_crtc_dpms);
exynos_crtc->dpms = mode;
}
static void exynos_drm_crtc_prepare(struct drm_crtc *crtc)
{
/* drm framework doesn't check NULL. */
}
static void exynos_drm_crtc_commit(struct drm_crtc *crtc)
{
struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
exynos_plane_commit(exynos_crtc->plane);
exynos_plane_dpms(exynos_crtc->plane, DRM_MODE_DPMS_ON);
}
static bool
exynos_drm_crtc_mode_fixup(struct drm_crtc *crtc,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
/* drm framework doesn't check NULL */
return true;
}
static int
exynos_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode, int x, int y,
struct drm_framebuffer *old_fb)
{
struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
struct drm_plane *plane = exynos_crtc->plane;
unsigned int crtc_w;
unsigned int crtc_h;
int pipe = exynos_crtc->pipe;
int ret;
/*
* copy the mode data adjusted by mode_fixup() into crtc->mode
* so that hardware can be seet to proper mode.
*/
memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode));
crtc_w = crtc->fb->width - x;
crtc_h = crtc->fb->height - y;
ret = exynos_plane_mode_set(plane, crtc, crtc->fb, 0, 0, crtc_w, crtc_h,
x, y, crtc_w, crtc_h);
if (ret)
return ret;
plane->crtc = crtc;
plane->fb = crtc->fb;
exynos_drm_fn_encoder(crtc, &pipe, exynos_drm_encoder_crtc_pipe);
return 0;
}
static int exynos_drm_crtc_mode_set_commit(struct drm_crtc *crtc, int x, int y,
struct drm_framebuffer *old_fb)
{
struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
struct drm_plane *plane = exynos_crtc->plane;
unsigned int crtc_w;
unsigned int crtc_h;
int ret;
/* when framebuffer changing is requested, crtc's dpms should be on */
if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {
DRM_ERROR("failed framebuffer changing request.\n");
return -EPERM;
}
crtc_w = crtc->fb->width - x;
crtc_h = crtc->fb->height - y;
ret = exynos_plane_mode_set(plane, crtc, crtc->fb, 0, 0, crtc_w, crtc_h,
x, y, crtc_w, crtc_h);
if (ret)
return ret;
exynos_drm_crtc_commit(crtc);
return 0;
}
static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
struct drm_framebuffer *old_fb)
{
return exynos_drm_crtc_mode_set_commit(crtc, x, y, old_fb);
}
static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
{
struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
exynos_plane_dpms(exynos_crtc->plane, DRM_MODE_DPMS_OFF);
exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
}
static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
.dpms = exynos_drm_crtc_dpms,
.prepare = exynos_drm_crtc_prepare,
.commit = exynos_drm_crtc_commit,
.mode_fixup = exynos_drm_crtc_mode_fixup,
.mode_set = exynos_drm_crtc_mode_set,
.mode_set_base = exynos_drm_crtc_mode_set_base,
.disable = exynos_drm_crtc_disable,
};
static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event,
uint32_t page_flip_flags)
{
struct drm_device *dev = crtc->dev;
struct exynos_drm_private *dev_priv = dev->dev_private;
struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
struct drm_framebuffer *old_fb = crtc->fb;
int ret = -EINVAL;
/* when the page flip is requested, crtc's dpms should be on */
if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {
DRM_ERROR("failed page flip request.\n");
return -EINVAL;
}
mutex_lock(&dev->struct_mutex);
if (event) {
/*
* the pipe from user always is 0 so we can set pipe number
* of current owner to event.
*/
event->pipe = exynos_crtc->pipe;
ret = drm_vblank_get(dev, exynos_crtc->pipe);
if (ret) {
DRM_DEBUG("failed to acquire vblank counter\n");
goto out;
}
spin_lock_irq(&dev->event_lock);
list_add_tail(&event->base.link,
&dev_priv->pageflip_event_list);
atomic_set(&exynos_crtc->pending_flip, 1);
spin_unlock_irq(&dev->event_lock);
crtc->fb = fb;
ret = exynos_drm_crtc_mode_set_commit(crtc, crtc->x, crtc->y,
NULL);
if (ret) {
crtc->fb = old_fb;
spin_lock_irq(&dev->event_lock);
drm_vblank_put(dev, exynos_crtc->pipe);
list_del(&event->base.link);
spin_unlock_irq(&dev->event_lock);
goto out;
}
}
out:
mutex_unlock(&dev->struct_mutex);
return ret;
}
static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
{
struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
struct exynos_drm_private *private = crtc->dev->dev_private;
private->crtc[exynos_crtc->pipe] = NULL;
drm_crtc_cleanup(crtc);
kfree(exynos_crtc);
}
static int exynos_drm_crtc_set_property(struct drm_crtc *crtc,
struct drm_property *property,
uint64_t val)
{
struct drm_device *dev = crtc->dev;
struct exynos_drm_private *dev_priv = dev->dev_private;
struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
if (property == dev_priv->crtc_mode_property) {
enum exynos_crtc_mode mode = val;
if (mode == exynos_crtc->mode)
return 0;
exynos_crtc->mode = mode;
switch (mode) {
case CRTC_MODE_NORMAL:
exynos_drm_crtc_commit(crtc);
break;
case CRTC_MODE_BLANK:
exynos_plane_dpms(exynos_crtc->plane,
DRM_MODE_DPMS_OFF);
break;
default:
break;
}
return 0;
}
return -EINVAL;
}
static struct drm_crtc_funcs exynos_crtc_funcs = {
.set_config = drm_crtc_helper_set_config,
.page_flip = exynos_drm_crtc_page_flip,
.destroy = exynos_drm_crtc_destroy,
.set_property = exynos_drm_crtc_set_property,
};
static const struct drm_prop_enum_list mode_names[] = {
{ CRTC_MODE_NORMAL, "normal" },
{ CRTC_MODE_BLANK, "blank" },
};
static void exynos_drm_crtc_attach_mode_property(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct exynos_drm_private *dev_priv = dev->dev_private;
struct drm_property *prop;
prop = dev_priv->crtc_mode_property;
if (!prop) {
prop = drm_property_create_enum(dev, 0, "mode", mode_names,
ARRAY_SIZE(mode_names));
if (!prop)
return;
dev_priv->crtc_mode_property = prop;
}
drm_object_attach_property(&crtc->base, prop, 0);
}
int exynos_drm_crtc_create(struct drm_device *dev, unsigned int nr)
{
struct exynos_drm_crtc *exynos_crtc;
struct exynos_drm_private *private = dev->dev_private;
struct drm_crtc *crtc;
exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
if (!exynos_crtc) {
DRM_ERROR("failed to allocate exynos crtc\n");
return -ENOMEM;
}
exynos_crtc->pipe = nr;
exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
init_waitqueue_head(&exynos_crtc->pending_flip_queue);
atomic_set(&exynos_crtc->pending_flip, 0);
exynos_crtc->plane = exynos_plane_init(dev, 1 << nr, true);
if (!exynos_crtc->plane) {
kfree(exynos_crtc);
return -ENOMEM;
}
crtc = &exynos_crtc->drm_crtc;
private->crtc[nr] = crtc;
drm_crtc_init(dev, crtc, &exynos_crtc_funcs);
drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
exynos_drm_crtc_attach_mode_property(crtc);
return 0;
}
int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int crtc)
{
struct exynos_drm_private *private = dev->dev_private;
struct exynos_drm_crtc *exynos_crtc =
to_exynos_crtc(private->crtc[crtc]);
if (exynos_crtc->dpms != DRM_MODE_DPMS_ON)
return -EPERM;
exynos_drm_fn_encoder(private->crtc[crtc], &crtc,
exynos_drm_enable_vblank);
return 0;
}
void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int crtc)
{
struct exynos_drm_private *private = dev->dev_private;
struct exynos_drm_crtc *exynos_crtc =
to_exynos_crtc(private->crtc[crtc]);
if (exynos_crtc->dpms != DRM_MODE_DPMS_ON)
return;
exynos_drm_fn_encoder(private->crtc[crtc], &crtc,
exynos_drm_disable_vblank);
}
void exynos_drm_crtc_finish_pageflip(struct drm_device *dev, int crtc)
{
struct exynos_drm_private *dev_priv = dev->dev_private;
struct drm_pending_vblank_event *e, *t;
struct drm_crtc *drm_crtc = dev_priv->crtc[crtc];
struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(drm_crtc);
unsigned long flags;
spin_lock_irqsave(&dev->event_lock, flags);
list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list,
base.link) {
/* if event's pipe isn't same as crtc then ignore it. */
if (crtc != e->pipe)
continue;
list_del(&e->base.link);
drm_send_vblank_event(dev, -1, e);
drm_vblank_put(dev, crtc);
atomic_set(&exynos_crtc->pending_flip, 0);
wake_up(&exynos_crtc->pending_flip_queue);
}
spin_unlock_irqrestore(&dev->event_lock, flags);
}
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